TY  - BOOK
AU  - Heckert, Paul A. 
AU  - Balonek, Thomas J. 
TI  - Instructor's manual to accompany introductory astronomy and astrophysics: instructors manual to accompany 
SN  - 0030045029
PY  - 1987///
CY  - New York
PB  - Saunders College Publishing
KW  - Astronomy
ER  -